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<style>
* {margin: 0; padding: 0;}
#container {min-height: 400px450px; width:100%; }
#left, #middle, #right {display: inline-block; *display: inline; zoom: 1; vertical-align: top; margin: 5px; }
#left {width: 30%; border: 2px solid #eee !important;}
#middle {width: 30%;  border: 2px solid #eee !important;}
#right {width: 30%;  border: 2px solid #eee !important;}
#learn {background-color: #009999 !important;}
</style>